Question 910288
(x+1)/(y+1) = 4/5,
(x-5)/(y-5) = 1/2
5*(x+1)=4*(y+1) 
5x+5=4y+4
(x-5)/(y-5) = 1/2
2*(x-5)=(y-5)
2x-10=y-5
2x=y+5
y=2x-5
5x+5=4y+4
5x+5=4(2x-5)+4
5x+5=8x-20+4
5x+5=8x-16
3x=21
x = 7
y=2x-5
y-14-5
y = 9

7/9 is original fraction